(1)(-12.5)x(-6/7)x(-4) (2)(-24/13)x(-16/7)x0x4/3 闲人免进,

3个回答

  • ①(-12.5)x(-6/7)x(-4) ②(-24/13)x(-16/7)x0x4/3 =0

    =﹣12.5×6/7×4

    =﹣300/7

    ③ (-1/2)x(-2/3)x(-1.25)x(-1又1/3)x(-1.8) ④【-7/12+3/4-5/6-(-5/18)】x(-36)

    =﹣1 =21-27+30-10

    =-14

    ⑤(-5)x3又1/3+2x3又1/3+(-6)x3又1/3 ⑥-55x(-1/5)-11x1/5+4x(-1/5)

    =(-50/3)+19/3- 20 =11-11/5-4/5

    =-30又1/3 =8

    (7)(-105又5/6)x(+12)

    =-1270

    不知有没有错